Character is your default settings. It’s what runs when you’re too tired to choose.

At full energy you can perform almost any version of yourself. The tired version runs without supervision and uses whatever repetition has installed. That is why character has less to do with big decisions than with what you practised until it stopped needing a decision at all. Exhaustion does not create a new person, it removes the editor.

Watch what happens at the end of a long day: the tone, the shortcut, the dish left in the sink. Pick one of those and practise it while you still have energy. You are writing the version that shows up later.